looks like the shop closed around this point at 22:51 when Shiv and Yamato were fighting inside the shop, and from that point on the shop didn't open again.
very weird, tried to replicate out of curiosity but not sure what is it. I thought it was the unsecured orb counting as enemy but upon replicating the exact situation; no results (being a shiv and executing a yamato), it must be something else that happened or a very rare specific thing
Got the same bug. Seems like if you go invis to the shop you bugged it for everyone. I had my team checking with me and it was closed. After 5-10 minutes it worked correctly.